Using sleep to make our program more predictable

Remember our earlier example that kept giving us different results each time we ran it? Look back and study the code and the sample output. Sometimes main had to wait until the new thread finished (and printed “top o’ the stack”), while other times the new thread would be sent back to runnable before it was finished, allowing the main thread to come back in and print out “back in main”. How can we fix that? Stop for a moment and answer this question: “Where can you put a sleep() call, to make sure that “back in main” always prints before “top o’ the stack”?

We’ll wait while you work out an answer (there’s more than one answer that would work).

Figure it out?